| Photocatalytic Overall Water Splitting over PbTiO3 Modulated by Oxygen Vacancy and Ferroelectric Polarization | |
| Wan, Gedeng1,2; Yin, Lichang1,6; Chen, Xing3; Xu, Xiaoxiang4; Huang, Jie1; Zhen, Chao1; Zhu, Huaze1; Huang, Biaohong1,2; Hu, Weijin1,2; Ren, Zhaohui5; Tian, He3; Wang, Lianzhou7; Liu, Gang1,2; Cheng, Hui-Ming1,8 | |
| Corresponding Author | Liu, Gang(gangliu@imr.ac.cn) |
| 2022-10-26 | |
| Source Publication | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
 |
| ISSN | 0002-7863 |
| Pages | 9 |
| Abstract | Ferroelectric materials hold great promise in the field of photocatalytic water splitting due to their spontaneous polarization that sets up an inherent internal field for the spatial separation of photogenerated charges. The ferroelectric polarization, however, is generally accompanied by some intrinsic defects, particularly oxygen vacancies, whose impact upon photocatalysis is far from being fully understood and modulated. Here, we have studied the role of oxygen vacancies over the photocatalytic behavior of single-domain PbTiO3 through a combination of theoretical and experimental viewpoints. Our results indicate that the oxygen vacancies in the negatively polarized facet (001) are active sites for water oxidation into O-2, while the defect-free sites prefer H2O2 as the oxidation product. The apparent quantum yield at 435 nm for photocatalytic overall water splitting with PbTiO3/Rh/Cr2O3 is determined to be 0.025%, which is remarkable for single undoped metal oxide-based photocatalysts. Furthermore, the strong correlation among oxygen vacancies, polarization strength, and photocatalytic activity is properly reflected by charge separation conditions in the single-domain PbTiO3 . This work clarifies the crucial role of oxygen vacancies during photocatalytic reactions of PbTiO3, which provides a useful guide to the design of efficient ferroelectric photocatalysts and their water redox reaction pathways. |
| Funding Organization | National Key R & D Program of China ; National Natural Science Foundation of China ; CAS Projects for Young Scientists in Basic Research ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; International Partnership Program of Chinese Academy of Sciences |
| DOI | 10.1021/jacs.2c08177 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key R & D Program of China[2021YFA1500800] ; National Natural Science Foundation of China[51825204] ; National Natural Science Foundation of China[52120105003] ; National Natural Science Foundation of China[51972312] ; National Natural Science Foundation of China[52188101] ; CAS Projects for Young Scientists in Basic Research[YSBR-004] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2020192] ; International Partnership Program of Chinese Academy of Sciences[174321KYSB20200005] |
| WOS Research Area | Chemistry |
| WOS Subject | Chemistry, Multidisciplinary |
| WOS ID | WOS:000877896500001 |
| Publisher | AMER CHEMICAL SOC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/176455 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Liu, Gang |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Zhejiang Univ, Ctr Electron Microscopy, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China 4.Tongji Univ, Sch Chem Sci & Engn, Shanghai 200092, Peoples R China 5.Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China 6.Univ Queensland, Sch Chem Engn, Nanomat Ctr, Brisbane, Qld 4072, Australia 7.Univ Queensland, Australian Inst Bioengn & Nanotechnol, Brisbane, Qld 4072, Australia 8.Chinese Acad Sci, Inst Technol Carbon Neutral, Shenzhen Inst Adv Technol, Shenzhen 518055, Peoples R China |
| Recommended Citation GB/T 7714 | Wan, Gedeng,Yin, Lichang,Chen, Xing,et al. Photocatalytic Overall Water Splitting over PbTiO3 Modulated by Oxygen Vacancy and Ferroelectric Polarization[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2022:9. |
| APA | Wan, Gedeng.,Yin, Lichang.,Chen, Xing.,Xu, Xiaoxiang.,Huang, Jie.,...&Cheng, Hui-Ming.(2022).Photocatalytic Overall Water Splitting over PbTiO3 Modulated by Oxygen Vacancy and Ferroelectric Polarization.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,9. |
| MLA | Wan, Gedeng,et al."Photocatalytic Overall Water Splitting over PbTiO3 Modulated by Oxygen Vacancy and Ferroelectric Polarization".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2022):9. |
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